WO2008036014A1 - Procédé de protection de l'embrayage - Google Patents

Procédé de protection de l'embrayage Download PDF

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Publication number
WO2008036014A1
WO2008036014A1 PCT/SE2007/000803 SE2007000803W WO2008036014A1 WO 2008036014 A1 WO2008036014 A1 WO 2008036014A1 SE 2007000803 W SE2007000803 W SE 2007000803W WO 2008036014 A1 WO2008036014 A1 WO 2008036014A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
vehicle
predetermined
time interval
driver
Prior art date
Application number
PCT/SE2007/000803
Other languages
English (en)
Inventor
Henrik Ryberg
Erik Lauri
Svante Karlsson
Lars Karlsson
Original Assignee
Volvo Lastvagnar Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volvo Lastvagnar Ab filed Critical Volvo Lastvagnar Ab
Priority to AT07835044T priority Critical patent/ATE511033T1/de
Priority to CN2007800346525A priority patent/CN101517260B/zh
Priority to BRPI0717079-3A priority patent/BRPI0717079B1/pt
Priority to EP07835044A priority patent/EP2069654B1/fr
Priority to JP2009528203A priority patent/JP5425628B2/ja
Priority to US12/441,387 priority patent/US8167775B2/en
Publication of WO2008036014A1 publication Critical patent/WO2008036014A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/08—Regulating clutch take-up on starting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/12—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to parameters of the vehicle itself, e.g. tyre models
    • B60W40/13—Load or weight
    • B60W2040/1353—Moment of inertia of a sub-unit
    • B60W2040/1369—Moment of inertia of a sub-unit the component being the clutch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B60W2510/0241—Clutch slip, i.e. difference between input and output speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
    • B60W2530/18—Distance travelled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/184—Preventing damage resulting from overload or excessive wear of the driveline
    • B60W30/186—Preventing damage resulting from overload or excessive wear of the driveline excessive wear or burn out of friction elements, e.g. clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/1045—Friction clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/108—Gear
    • F16D2500/1081—Actuation type
    • F16D2500/1082—Manual transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/30406—Clutch slip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/316—Other signal inputs not covered by the groups above
    • F16D2500/3166—Detection of an elapsed period of time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50224—Drive-off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50296—Limit clutch wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/71—Actions
    • F16D2500/7101—Driver alarm

Definitions

  • the invention relates to a method for protecting a clutch, from excessive slip, said clutch being arranged in a vehicle being provided with an automated manual transmission.
  • the vehicle comprises an engine, the clutch, a gearbox having an input shaft and being connected to drive wheels of the vehicle, and a controller controlling clutch engagement .
  • the present invention also relates to a computer program and computer program product both to be used with a computer for executing said method.
  • An automatic transmission does not include a clutch; instead, a torque converter is used to partly disconnect the engine from the gearbox, e.g. at idling conditions .
  • Most torque converters are filled with a fluid, e.g. oil, wherein the oil level in the torque converter increases with increasing engine speed. This makes it possible to achieve a torque transmission from the engine to the gearbox that increases rapidly with increasing engine speed. During engine idling, only a small torque is transmitted from the engine to the gearbox.
  • an automatic transmission is very robust; it is almost impossible to ruin or wear an automatic transmission by erratic driver behavior, which could be easily achieved with a manual transmission.
  • One severe drawback with automatic transmissions is, however, that they are less efficient than manual transmissions, mainly due to torque converter slip.
  • the torque converter of an automatic transmission is designed to slip.
  • the engine cooling system or a separate cooler for the torque converter fluid dissipates the heat generated in the torque converter.
  • Clutches for manual transmissions or automated manual transmissions generally do not have cooling systems, and moreover, the clutch is subject to wear if excessive slip is present.
  • Another possible way to induce wear and heat buildup in the clutch is to "creep" with the vehicle, i.e. apply a slight pressure on the accelerator pedal, and release the pressure as the vehicle starts moving.
  • a correct driver behavior would be to apply the brake in the uphill slope, and to move the vehicle in the forward direction in "steps", i.e. wait until the road is clear, apply a proper accelerator pedal pressure, accelerate, release the gas completely and allow the vehicle to slow down.
  • US 6 482 123 describes a method and a system for calculating heat buildup in the clutch.
  • the calculation of US 6 482 123 is based on information regarding engine speed, speed of the incoming shaft of the gearbox, and engine output torque, and the result of the analysis is used for informing the clutch controller to use a more aggressive clutch engagement for reducing clutch slip, or to fully disengage the clutch for reducing clutch wear and heat build-up.
  • WO9522014 describes another energy calculation based excessive clutch slip warning arrangement.
  • the position of the clutch actuator can be used as an input for the energy calculation.
  • US6812828 describes an excessive clutch slip warning arrangement where a warning is initiated when the rotational speed of the gearbox is zero or almost zero and the depressing of an accelerator pedal is not zero and not more than a predetermined limit.
  • the warning signal can be postponed a predetermined time.
  • the method according to the invention is a method for protecting a clutch of a vehicle from excessive clutch slip, said vehicle being provided with an engine, drive wheels and an automated manual transmission for transmitting of drive power from said engine to said drive wheels .
  • the automated manual transmission comprises said clutch, a gearbox and a controller for controlling clutch engagement in response to sensed engine speed, input shaft speed of said gearbox and drive power demand from a vehicle driver.
  • the present invention solves the above and other problems by using the steps of: a. sensing a power demand from the driver which results in a clutch control where the clutch is partly engaged and clutch slip occurs, b. measuring travelling distance of the vehicle during a predetermined first time interval, c. initiating a first warning measure, in order to alert the driver of excessive clutch slip, if the vehicle has traveled less than a predetermined distance during said predetermined first time interval .
  • One advantage is that unnecessary warnings will be decreased by a method according to the invention.
  • the method comprises also the following step: starting said first time interval with the start of the clutch slip.
  • the method comprises also the following step: starting said first time interval a predetermined short time after the start of the clutch slip.
  • step c above is modified to comprise the following steps instead: d. initiating a measuring of vehicle speed, e. initiating said first warning only if ; the vehicle has traveled less than said predetermined distance during said predetermined first time interval, and said measured vehicle speed is below a predetermined vehicle speed value . This will further decrease unnecessary warnings .
  • step c above is modified to comprise the following steps instead: d. initiating a measuring of vehicle speed increase, e. initiating said first warning only if ; the vehicle has traveled less than said predetermined distance during said predetermined first time interval, and said measured vehicle speed increase is below a predetermined vehicle speed increase value. This measure will also contribute to further decrease unnecessary warnings .
  • step c above is modified to comprise the following steps : d. initiating a measuring of vehicle speed, e. initiating a measuring of vehicle speed increase, f . initiating said first warning only if ; the vehicle has traveled less than said predetermined distance during said predetermined first time interval, and said measured vehicle speed is below a predetermined vehicle speed value, and said measured vehicle speed increase is below a predetermined vehicle speed increase value.
  • said controller can be programmed to initiate a second warning measure, in order to further alert the driver of excessive clutch slip, when a second time interval has passed, said second time interval starting when said first time interval has ended.
  • said first time interval is 4 to 10 seconds long.
  • said second time interval is 2 to 10 seconds long.
  • the method according to the invention is only used if a gearshift lever of the vehicle is put in a position ordering a forward drive.
  • the method might not be used if the gear lever is put in the reverse position.
  • said first warning measure comprising a lighting of a light and/or a sounding of a beeper in a driver compartment of the vehicle.
  • the controller could respond to the warning signal by slowly engaging the clutch. This is probably very inconvenient to the driver, which hopefully will stop the erratic behavior. In another embodiment of the invention, the controller could respond to the warning signal by disengaging the clutch.
  • figure 1 is a flow scheme showing the different method steps deployed according to one embodiment of the invention and figure 2 shows the invention applied on a computer arrangement.
  • the torque applied by the driver over the clutch should equal a torque transferred from the wheels, via the gearbox, to the clutch.
  • Applying a slight accelerator pedal pressure in order to stand still in an upward slope is often referred to as "hanging" on the clutch, and it produces an excessive slip and, thus, wear in the clutch.
  • sensors and controllers governing and sensing e.g. clutch position, engine speed, accelerator pedal position and rotational speed of an incoming gearbox shaft will be given .
  • the driver will apply a pressure to the accelerator pedal, which instructs the engine to increase its rotational speed.
  • the increased engine speed is "braked” by the clutch starting to engage, hence transferring a torque to the gearbox, which torque ultimately will be transferred to the wheels; by the torque transferred to the wheels, the vehicle will take off, i.e. start from standstill.
  • the clutch will "slip", since the engine speed is higher than the rotational speed of the incoming shaft.
  • the clutch engagement will be held in a position allowing a certain amount of clutch slip until the rotational speed of the incoming gearbox shaft of the gearbox equals the engine speed.
  • the clutch will be fully engaged, allowing full engine torque being transmitted to the gearbox, and ultimately to the drive wheels . This will make the vehicle accelerate until a predetermined engine speed has been reached, after which the controller disengages the clutch, puts in a higher gear and reengages the clutch to achieve further acceleration.
  • an erratic driver behavior regarding accelerator pedal movement primarily "hanging" on the clutch and not applying enough accelerator pedal pressure, could be detected and prevented by applying different warnings to the driver for erratic accelerator pedal behavior.
  • the accelerator pedal position, the engine speed and the speed of the incoming gearbox shaft are continuously sensed. Should, the accelerator pedal position indicate that the clutch is a partly engaged clutch, and the engine speed differs from a speed of the incoming gearbox shaft, a timer counting the time t is started.
  • the scheme in figure 1 starts in step 1. If "Yes” in step 2 said timer is started in step 3.
  • the timer could count the time t from clutch slipping initiation, and could be reset in case the clutch position would become fully disengaged (corresponds to a more released accelerator pedal) or if the speed of the incoming gearbox shaft would exceed a predetermined percentage of the engine speed (corresponds to a more depressed accelerator pedal) .
  • the timer could be started some short time after the clutch slipping has started.
  • the controller is programmed to measure the vehicle travel distance s by measuring, for example, the speed of the input shaft as an integral over time, starting in step 3, i. e. in the shown embodiment at the same time as the timer starts. In this way an absolute travelling distance of the vehicle is measured.
  • the vehicle is standing in an uphill and the driver depresses the accelerator pedal to a degree so that the torque transmitted to the driving wheels would be enough to hold the vehicle ("hanging" on the clutch) and that the driver additionally varies his/hers depression of the accelerator pedal over time t around this accelerator pedal position so that the vehicle would typically rock back and forth.
  • interval tl could be set, for example 2 meters during 8 seconds. If the vehicle does not travel longer than said minimum absolute travelling distance si (see step 5) during said predetermined first time interval tl, the controller could be programmed to initiate a first warning measure (see step 6), in order to alert the driver of excessive clutch slip.
  • the scheme ends in step 7.
  • the controller is programmed to initiate a measure of the vehicle speed when an excessive clutch slip condition as above has been established. The vehicle speed measuring is initiated instead of directly initiating said first warning measure (see step 6 in figure 1) . The controller is then further programmed to initiate said first warning only if;
  • the controller is programmed to initiate a measure of a vehicle speed increase when an excessive clutch slip condition as above has been established.
  • the vehicle speed increase measuring is initiated instead of directly initiating said first warning measure.
  • the controller is then further programmed to initiate said first warning only if; -the vehicle has traveled less than said predetermined distance during said predetermined first time interval, and said measured vehicle speed increase is below a predetermined vehicle speed increase value. In this way a warning to the driver is only initiated if the driver seems to continue with the clutch slip.
  • the controller is programmed to combine the vehicle speed measuring and the vehicle speed increase measuring.
  • the controller is then programmed to initiate said first warning only if the vehicle has traveled less than said predetermined distance during said predetermined first time interval, and said measured vehicle speed is below a predetermined vehicle speed value, and said measured vehicle speed increase is below a predetermined vehicle speed increase value.
  • the above mentioned first warning measure could constitute one or several of the following measures:
  • the clutch could be engaged or disengaged slowly, so the driver has plenty of time to react and hit the brakes .
  • Said first time interval can be 4 to 10 seconds long. In a preferred embodiment said first time interval can be 6 to 8 seconds.
  • the method could be adjusted to detect various types of erratic behavior, e.g. by adjusting the predetermined percentage of the engine speed the incoming gearbox shaft should have in order to reset the timer. If this percentage is set to a low value, e.g. 5 percent of the engine speed, the method will be able to detect erratic behavior close to standstill, i.e. "hanging" on the gas in an uphill slope, such as explained earlier. If the percentage is set to a high value, e.g. 100 percent (indicating co-rotating engine and incoming gearbox shaft) , the method could also be used to detect bad, i.e. slow, vehicle take-offs.
  • a predetermined second time interval starting when the first time interval has ended.
  • the controller could be programmed to initiate a second warning measure, such as a forced engagement or disengagement of the clutch (if such a measure has not already been taken with the first warning measure) .
  • a second warning measure such as a forced engagement or disengagement of the clutch (if such a measure has not already been taken with the first warning measure) .
  • the clutch could be engaged or disengaged slowly, so the driver has plenty of time to react and hit the brakes. This would communicate a second warning of excessive clutch slip to the driver.
  • Said forced engagement of the clutch can be controlled via a preprogrammed ramp, which ramp decides the speed of engagement for a certain torque demand input through the accelerator pedal.
  • said ramp for controlling the clutch could be changed every time the timer counting is reset.
  • the ramp is changed to a steeper, i. e. more aggressive engagement compared to the previous used ramp.
  • One first ramp could be the one used the first time, thus having a relatively slow speed of engagement for a certain torque demand input through the accelerator pedal.
  • a second ramp could have, for example, a 2,5 times more aggressive, i. e. faster engagement for the same torque demand compared to the first ramp.
  • a third ramp could have an even further 2,5 times (or other figure) more aggressive engagement compared to the second ramp.
  • This embodiment would after a few "pumping"-actions force the driver either to stop the vehicle with the service brake, which means that the clutch would be disengaged, or force the driver to drive away, which means that the clutch would be fully engaged.
  • This embodiment with different ramps could also be used in connection with a first warning measure, where said first warning measure is a clutch engagement .
  • the first time interval enables the controller to take a first measure, e.g. warn the driver that his behavior is erratic, if the first predetermined time interval has ended, and a second measure, e.g. a clutch disengagement or engagement, if the driver makes no correction of his erratic behavior, i.e. applies more or less accelerator pedal pressure, after having received the first warning of erratic behavior.
  • a first measure e.g. warn the driver that his behavior is erratic
  • a second measure e.g. a clutch disengagement or engagement
  • a suitable first warning could be to light a warning light or sound a beeper, i.e. to produce a sound signal, in the vehicle cabin.
  • a beeper i.e. to produce a sound signal
  • the controller may send a second warning to the driver.
  • the second warning may e.g. be a slow clutch engagement or disengagement; should the clutch be engaged, the vehicle would start accelerating, and tests have shown that drivers in such cases will release the accelerator pedal and hit the vehicle brakes. Most drivers will find such a clutch engagement very inconvenient; hence, the erratic behavior will cease rapidly.
  • the second warning is clutch disengagement, the driver will lose drive wheel torque, which, if the vehicle is in an upward slope, will make the vehicle travel backwards and the engine to increase its speed. A natural driver behavior is to release the accelerator pedal and hit the brakes in such a situation; hence, excessive clutch wear could be avoided, and the driver learns to avoid such erratic behavior.
  • said second time interval can be 2 to 10 seconds long.
  • the invention solves the problem with erratic driver behavior regarding clutch wear in a very efficient way.
  • One such modification could be use the method only when the gear shift lever is in the position "drive”, i.e. forward driving position; during backwards maneuvers, it might be necessary for the driver to allow for some clutch slip in order to achieve a safe, smooth backing maneuver.
  • Figure 2 shows an apparatus 500 according to one embodiment of the invention, comprising a nonvolatile memory 520, a processor 510 and a read and write memory 560.
  • the memory 520 has a first memory part 530, in which a computer program for controlling the apparatus 500 is stored.
  • the computer program in the memory part 530 for controlling the apparatus 500 can be an operating system.
  • the apparatus 500 can be enclosed in, for example, a controller, such as the above mentioned controller.
  • the data-processing unit 510 can comprise, for example, a microcomputer .
  • the memory 520 also has a second memory part 540, in which a program for warning the driver of excessive clutch slip according to the invention is stored.
  • the program for warning the driver of excessive clutch slip is stored in a separate nonvolatile data storage medium 550, such as, for example, a CD or an exchangeable semiconductor memory.
  • the program can be stored in an executable form or in a compressed state.
  • the data-processing unit 510 runs a specific function, it should be clear that the data- processing unit 510 is running a specific part of the program stored in the memory 540 or a specific part of the program stored in the nonvolatile recording medium 550.
  • the data-processing unit 510 is tailored for communication with the memory 550 through a data bus 514.
  • the data- processing unit 510 is also tailored for communication with the memory 520 through a data bus 512.
  • the data-processing unit 510 is tailored for communication with the memory 560 through a data bus 511.
  • the data-processing unit 510 is also tailored for communication with a data port 590 by the use of a data bus 515.
  • the method according to the present invention can be executed by the data-processing unit 510, by the data- processing unit 510 running the program stored in the memory 540 or the program stored in the nonvolatile recording medium 550.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Control Of Transmission Device (AREA)
  • Mechanical Operated Clutches (AREA)
  • Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

La présente invention concerne un procédé de protection de l'embrayage d'un véhicule, ledit véhicule étant muni d'un moteur, de roues motrices et d'une boîte de vitesses manuelle automatisée destinée à transmettre la puissance d'entraînement dudit moteur vers lesdites roues motrices. Un boîtier électronique de commande peut effectuer les étapes suivantes : d. détecter une demande de puissance de la part du conducteur résultant en une commande d'embrayage où l'embrayage est partiellement engagé et un patinage de l'embrayage a lieu, e. mesurer la distance de déplacement (s) du véhicule durant un premier intervalle de temps prédéterminé (tl, 3, 4, 5), f. amorcer une première mesure d'avertissement (6) afin d'alerter le conducteur d'un patinage d'embrayage excessif si le véhicule a parcouru une distance inférieure à une distance prédéterminée (si) durant ledit premier intervalle de temps prédéterminé (tl).
PCT/SE2007/000803 2006-09-18 2007-09-13 Procédé de protection de l'embrayage WO2008036014A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT07835044T ATE511033T1 (de) 2006-09-18 2007-09-13 Verfahren zur herstellung einer kupplung
CN2007800346525A CN101517260B (zh) 2006-09-18 2007-09-13 离合器保护方法
BRPI0717079-3A BRPI0717079B1 (pt) 2006-09-18 2007-09-13 Método para proteção de embreagem
EP07835044A EP2069654B1 (fr) 2006-09-18 2007-09-13 Procédé de protection de l'embrayage
JP2009528203A JP5425628B2 (ja) 2006-09-18 2007-09-13 クラッチ保護方法
US12/441,387 US8167775B2 (en) 2006-09-18 2007-09-13 Method for clutch protection

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US60/826,041 2006-09-18

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EP2886901A1 (fr) * 2013-12-18 2015-06-24 AVL List GmbH Procédé de contrôle de la transmission d'un véhicule
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US8255133B2 (en) 2009-06-05 2012-08-28 Toyota Motor Engineering & Manufacturing North America, Inc. Shift timing indicator system for vehicular manual transmission
WO2011093787A1 (fr) * 2010-02-01 2011-08-04 Scania Cv Ab Procédé et système se rapportant à un embrayage à commande automatique
WO2013100843A1 (fr) * 2011-12-28 2013-07-04 Scania Cv Ab Procédé et système pour la commande d'un embrayage de véhicule
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FR3070342A1 (fr) * 2017-08-29 2019-03-01 Psa Automobiles Sa Procede de protection d’une butee de debrayage pour un vehicule automobile
EP3450787A1 (fr) * 2017-08-29 2019-03-06 PSA Automobiles SA Procédé de protection d'une butée de débrayage pour un véhicule automobile
FR3075137A1 (fr) * 2017-12-18 2019-06-21 Psa Automobiles Sa Procede d’accompagnement a la conduite d’un conducteur pour limiter l’usure de composants d’un vehicule automobile
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BRPI0717079A2 (pt) 2013-10-29
EP2069654A4 (fr) 2010-04-07
JP5425628B2 (ja) 2014-02-26
CN101517260A (zh) 2009-08-26
JP2010503811A (ja) 2010-02-04
ATE511033T1 (de) 2011-06-15
EP2069654B1 (fr) 2011-05-25
RU2009114723A (ru) 2010-10-27
US20100075804A1 (en) 2010-03-25
US8167775B2 (en) 2012-05-01
RU2448007C2 (ru) 2012-04-20
CN101517260B (zh) 2012-05-02
EP2069654A1 (fr) 2009-06-17
BRPI0717079B1 (pt) 2020-03-24

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